Analysis
- max time kernel
298s - max time network
299s - platform
windows11-21h2_x64 - resource
win11-20260911-en - resource tags
- submitted
17/10/2026, 00:09
General
- Target Client-built.exe
- Size 1.2MB
- Sample261017-afrfrayw3q
- SHA256 5db20cf621a5d36a4a0bb0f57dc943442c22c2608bfe751d073664e1bc777d2b
Malware Config
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Pulsar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Pulsar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Client.exe
memory/1320-0-0x00000271084B0000-0x00000271085E8000-memory.dmp
memory/1320-1-0x00000271237A0000-0x00000271237B0000-memory.dmp
memory/1320-2-0x000002710A370000-0x000002710A38A000-memory.dmp
memory/1864-13-0x0000023ED7E90000-0x0000023ED7EDA000-memory.dmp
memory/1864-16-0x0000023ED7FB0000-0x0000023ED7FE4000-memory.dmp
memory/1864-11-0x0000023ED7EE0000-0x0000023ED7F30000-memory.dmp
memory/1864-12-0x0000023ED7FF0000-0x0000023ED80A2000-memory.dmp
memory/1864-9-0x0000023ED79C0000-0x0000023ED79D0000-memory.dmp
memory/1864-15-0x0000023ED7F80000-0x0000023ED7FA6000-memory.dmp
memory/1864-14-0x0000023ED7F30000-0x0000023ED7F7C000-memory.dmp
memory/1864-10-0x0000023ED7E80000-0x0000023ED7E92000-memory.dmp
memory/1864-19-0x0000023ED79C0000-0x0000023ED79D0000-memory.dmp
memory/1864-22-0x0000023ED8670000-0x0000023ED8682000-memory.dmp
memory/1864-23-0x0000023ED86D0000-0x0000023ED870C000-memory.dmp
memory/1864-24-0x0000023ED8690000-0x0000023ED869A000-memory.dmp
memory/1864-25-0x0000023ED86C0000-0x0000023ED86C8000-memory.dmp
memory/1864-26-0x0000023ED86B0000-0x0000023ED86C6000-memory.dmp